Ataxia and Polyneuropathy, Adult-Onset, also known as adult-onset ataxia and polyneuropathy, is related to mitochondrial complex v deficiency, mitochondrial type 1 and retinitis pigmentosa. An important gene associated with Ataxia and Polyneuropathy, Adult-Onset is MT-ATP6 (Mitochondrially Encoded ATP Synthase Membrane Subunit 6). Affiliated tissues include eye and endothelial.